You will need to butterfly the shrimp. Using a sharp knife, cut each shrimp lengthwise along the back.

In a blender, add the chilies, lime juice, cilantro, and the first teaspoon of salt. Blend until the chilies are just broken up. Don’t worry about making a smooth paste. A few chunks of chili are not a problem.

Cover the shrimp with the blended sauce. Marinate in the refrigerator for 15 – 20 minutes. You will know it’s done when the surface of the shrimp begins to turn opaque and white.

While the shrimp is marinating, peel the cucumber and scrape out the seeds.

Add the cucumber & onion to the bowl of shrimp and toss to combine. Spoon the shrimp, cucumber,onions and sauce into a large flat serving dish. Sprinkle with the remaining 1/4 teaspoon salt. Top with the sliced onions and serve with tostadas or chips.

This was sooo good. as i was making it you could smell the amazingness it was light and fresh and limey ….mmmm im making my mouth water blogging about it.